/* =============================================================================
 * Calendar Year Picker Component Styles
 *
 * Internal component used inside Calendar / RangeCalendar to provide a
 * toggleable year selector. Uses CSS :has() on the parent .calendar to
 * drive crossfade transitions.
 *
 * The year grid is absolutely positioned and sized via JS to match the
 * day grid's exact area. This keeps the calendar's original block layout
 * completely untouched.
 *
 * BEM naming: calendar-year-picker__element, calendar-year-picker--modifier
 * ============================================================================= */

/* -----------------------------------------------------------------------------
 * Positioning Context
 * -------------------------------------------------------------------------- */
.calendar:has(.calendar-year-picker__year-grid),
.range-calendar:has(.calendar-year-picker__year-grid) {
  position: relative;
}

/* -----------------------------------------------------------------------------
 * Crossfade + Blur Transitions
 *
 * The crossfade is staggered to avoid both grids being semi-transparent at
 * the same time (ghosting). When opening, the day grid fades out first,
 * then the year grid fades in. When closing, the year grid fades out first,
 * then the day grid fades in (via transition-delay).
 *
 * -------------------------------------------------------------------------- */

/* Day grid – default visible */
.calendar:has(.calendar-year-picker__year-grid) > [data-slot="calendar-grid"],
.range-calendar:has(.calendar-year-picker__year-grid) > [data-slot="range-calendar-grid"] {
  will-change: opacity;
  transition:
    opacity 150ms var(--ease-out),
    visibility 0ms linear;
  @apply motion-reduce:transition-none;
}

/* Day grid – hidden when year picker is open (fade + blur out) */
.calendar:has(.calendar-year-picker__year-grid[data-open="true"]) > [data-slot="calendar-grid"],
.range-calendar:has(.calendar-year-picker__year-grid[data-open="true"])
  > [data-slot="range-calendar-grid"] {
  @apply pointer-events-none opacity-0;
  visibility: hidden;
  transition:
    opacity 150ms var(--ease-out),
    visibility 0ms linear 150ms;
  @apply motion-reduce:transition-none;
}

/* -----------------------------------------------------------------------------
 * Trigger Button
 * -------------------------------------------------------------------------- */
.calendar-year-picker__trigger {
  @apply flex flex-1 items-center justify-start gap-1 rounded-lg outline-none;

  cursor: var(--cursor-interactive);
  touch-action: manipulation;

  /* Focus state */
  &:focus-visible {
    @apply status-focused;
  }
}

.calendar-year-picker__trigger-heading {
  @apply text-sm font-medium;

  transition: color 150ms var(--ease-out);
  @apply motion-reduce:transition-none;
}

.calendar-year-picker__trigger-indicator {
  @apply text-xs text-accent;

  transition: transform 150ms var(--ease-out);
  @apply motion-reduce:transition-none;
}

/* Rotate chevron when open */
.calendar-year-picker__trigger[data-open="true"] .calendar-year-picker__trigger-indicator {
  transform: rotate(90deg);
}

.calendar-year-picker__trigger[data-open="true"] .calendar-year-picker__trigger-heading {
  @apply text-accent;
}

/* -----------------------------------------------------------------------------
 * Year Grid Container
 *
 * Absolutely positioned over the day grid area. The exact `top` and `height`
 * are set via JS to match the sibling day grid element.
 * -------------------------------------------------------------------------- */
.calendar-year-picker__year-grid {
  @apply pointer-events-none absolute right-0 left-0 grid content-start gap-1 overflow-y-auto p-1 opacity-0;
  grid-template-columns: repeat(3, 1fr);

  /* When closing: instant (no transition) */
  will-change: opacity;

  /* Custom scrollbar – small contained element, per Emil's guidelines */
  scrollbar-width: thin;
  scrollbar-color: oklch(0% 0 0 / 0.15) transparent;

  &::-webkit-scrollbar {
    width: 6px;
  }

  &::-webkit-scrollbar-track {
    background: transparent;
  }

  &::-webkit-scrollbar-thumb {
    background: oklch(0% 0 0 / 0.15);
    border-radius: 3px;
  }

  &::-webkit-scrollbar-thumb:hover {
    background: oklch(0% 0 0 / 0.25);
  }

  /* Dark mode scrollbar */
  :is([data-theme="dark"], .dark) & {
    scrollbar-color: oklch(100% 0 0 / 0.15) transparent;

    &::-webkit-scrollbar-thumb {
      background: oklch(100% 0 0 / 0.15);
    }

    &::-webkit-scrollbar-thumb:hover {
      background: oklch(100% 0 0 / 0.25);
    }
  }
}

.calendar-year-picker__year-grid[data-open="true"] {
  @apply pointer-events-auto opacity-100;

  /* When opening: slight delay so the day grid starts fading out first */
  transition: opacity 200ms var(--ease-out) 50ms;
  @apply motion-reduce:transition-none;
}

/* -----------------------------------------------------------------------------
 * Year Cell
 * -------------------------------------------------------------------------- */
.calendar-year-picker__year-cell {
  @apply relative inline-flex items-center justify-center rounded-full px-2.5 py-1.5 text-sm font-medium outline-none select-none no-highlight;
  touch-action: manipulation;

  /**
   * Transitions – same as .tag
   * CRITICAL: motion-reduce must be AFTER transition for correct override specificity
   */
  transition:
    color 100ms var(--ease-smooth),
    scale 100ms var(--ease-smooth),
    opacity 100ms var(--ease-smooth),
    background-color 100ms var(--ease-smooth),
    box-shadow 100ms var(--ease-out);
  @apply origin-center transform-gpu motion-reduce:transition-none;

  cursor: var(--cursor-interactive);

  /* Hover state (when not selected) – only on devices that support hover */
  @media (hover: hover) and (pointer: fine) {
    &:is(:hover, [data-hovered="true"]):not([data-selected="true"]) {
      @apply bg-default text-default-foreground;
    }
  }

  /* Selected state (current year) – same as .tag[data-selected] */
  &[data-selected="true"],
  &[aria-selected="true"] {
    @apply bg-accent text-accent-foreground;

    @media (hover: hover) and (pointer: fine) {
      &:is(:hover, [data-hovered="true"]) {
        @apply bg-accent-hover;
      }
    }
  }

  /* Focus state */
  &:focus-visible {
    @apply status-focused;
  }
}